Roller and drum



1 Feb. 22 1927.

E. SCHMITT ROLLER AND DRUM Filed Nov. 25. 1924 r 2% 5n x 6 Wd M I .been dispensed with by Patented Feb. 22, 1927.

ED'UABD SGHMITT,

OHEMNITZ,

OF CHEMNITZ, GERMANY, ASSIGNOB TO C. G. HAUBOLD, A. G., O}?

GERMANY, A CORPORATION OF GERMANY.

ROLLER AND DRUM.

Application filed November 25, 1924, Serial No. 752,098, and in Germany June 1, 1923.

My invention relates'to improvements in rollers and drums such as are used in machines for bleaching, d eing, and wet dressing of textile matter. ollers and drums of this kind must be proof against the action of lyes, acid, chlorine, and other chemicals, for which reason they are provided. with coatings of copper, brass, bronze, and the like, or they are made from such metals. Rollers or coated are expensive, and where they are comparatively long they can not be made with small diameters, as is frequently desired. In hollow rollers the coatings have constructing the same with strong walls and from vulcanized rubber or tempered steel. Rollers of this type show suflicient hardness, but they are very expensive, and when made from steel they A of the pipe are to some extent subject to corrosion.

The object of the improvements is to provide rollers or drums for machines of the class referred to which are durable, and proof against corrosion and which can be manufactured at low cost, and with this object in view I construct the said rollers or drums from iron or sheet iron having a chromized surface. Thereby I am enabled to construct the body of the roller or drum from low grade iron, and more particularly I am enabled to construct the drums from sheet metal.

For the purpose of explaining the invention several examples embodying the same have been shown in the accompanying drawing inwhich the same reference characters have been used in allthe views to indicate corresponding parts. In said drawing,

'g. 1, is a sectional view showing a tubular roller,

Fig. 2, is an elevation showing a solid roller,

Fig. 3, is a sectional View showinga feeding or guiding drum. V

Fig. 1 shows a tubular roller made from a seamless iron pipe e mounted on a shaft a through the intermediary of hubs (Z. In one construction the dimensions are: length 2250 millimeters, diameter 90 millimeters. The chromized skin ch of the roller has been indicated in dotted lines. The rollers shown in the figure aredesigned for use in wet dressing in mercerizing machines, cylinder drying machines, dressing drums which have thus beenmachines, and steam machines, and for dry dressing in gas singes, oxidation machines and drying machines for the delivery of the goods.

Fig. 2 shows a solid roller 4) made from low grade iron and provided with a chromized skin 0h. In one construction the dimensions are as follows: length of the roller excluding the trunnions 4000 millimeters, diameter 700 millimeters. A roller of this type is used for squeezing purposes, but it may also be used for calendering paper and the like.

Instead of solid rollers'I use in many cases tubular rollers having thick walls and provided with heating means. By providing the rollers with chromized skins I may manufacture the same from a low grade iron which by reason of the chromized surface. has high corrosion resisting properties and takes a high polish. Such roll'ers which are made with thick walls and median diameters are used as pressing rollers for wet dressing in broad washing and acid machines, squeezing machines, dyeing machines of any type, wet calenders and dry dressing in calenders.

Fig. 3 shows a drum made from a sheet iron cylinder I) mounted on end disks 8, and s, and coated With chromium, as is shown at ch. Drums of this type are used as guiding means in wet and dry dressing machines, paper making machines, and the like.

The surface of the rollers or be chromized by any known or preferred process, for example by the process which consists in heating the metal under nonoxidizing conditions in contact with a powdered charge containing metallic chromium at atemperature below the melting point of either metal.

I claim:

A rotating iron body adapted to produce pressure, particularly for use in machines for bleaching, dyeing and the wet dressing of textile materials, having a chromized surface, whereby said surface is rendered not'only rust and acid resistant but also very hard.

In testimony whereof I hereunto aflix my signature.

EDUARD SCHMITT.

drums may 

